|
|
Subaru Forester1997-2005 of releaseRepair and operation of the car |
|
|
Subaru Forester + Subaru Forester cars + Maintenance instruction + Routine maintenance + Engine + Cooling systems, heating - Power supply system and release Specifications System of production of the fulfilled gases - the general information Measurement of pressure of fuel Dumping of pressure in a power supply system Principle of action and check of serviceability of functioning of the fuel pump Service of the fuel filter Check of a state and replacement of fuel lines and their nipple connections Service of the cross over valve Removal and installation of the case of a throttle Fuel injection injectors - the general information and service The fuel pressure regulator - general information Cleaning and repair of the fuel tank - general information Removal and installation of the sensor of measurement of mass of air (MAF) Check of serviceability of functioning of system of electronic injection System of a turbo-supercharging - the general information Service of system of a turbo-supercharging System of release - the general information + Engine electric equipment + Control systems of the engine + Gear shifting box + Coupling, transmission line + Brake system + Suspension bracket and steering + Body + Onboard electric equipment |
Power supply system and release Power supply system - the general information All models considered in the present manual are equipped with electronic system of injection of fuel of distributed (MPFI) of type. And, some of models with system of the distributed injection are in addition equipped with a turbo-supercharging.Systems of the distributed injection of fuel (MPFI) In the MPFI systems giving in the engine of optimum composition of air-fuel mix on all modes of operation is provided by means of modern electronic technology. The regulator of pressure of fuel supports continuous difference of pressure between the entrance and output section of each of injection injectors. The regulator is equipped with the locking valve, a sensitive element of membrane type and the loaded spring. Control of pressure difference is exercised of a fuel drosselirovaniye in a gap between the locking valve and its saddle. Excess fuel on the returnable line is taken away back in the fuel tank. The amount of the fuel injected into the engine is dosed by management of time of opening of the electromagnetic valves which are built in in injectors. The amount of the air given to the engine is defined by the provision of a butterfly valve and frequency of rotation of a bent shaft. The sensor of measurement of a stream of air installed in the inlet highway delivers to the module of management information on the basis of which ESM determines the required duration of opening of injectors. MPFI control system on the basis of the analysis arriving from various information sensors carries out continuous monitoring of parameters of injection, providing a possibility of adjustments at the slightest changes of load of the engine and other operational characteristics. The scheme of an arrangement of information sensors in a motive compartment
As a result, the system allows to reduce issue level in the atmosphere of the toxic making fulfilled gases, to reduce fuel consumption, to lift engine capacity, to optimize parameters of dispersal and braking by the engine, to facilitate start of the cold engine. Air, having passed the air cleaner, comes to the throttle case, then further to the inlet pipeline. On the models equipped with system of a turbo-supercharging, air after compression in the compressor is cooled in an intermediate cooler (Intercooler). In the pipeline fuel is injected into an air stream through injectors and the formed air-fuel mix evenly is distributed on engine cylinders. A part of air on a bypass is passed bypassing the throttle case. The consumption of this additional air is controlled by the special perepuskny valve at the expense of what control of idling turns is exercised. The block of self-diagnostics which is a part of the module of management serves for identification of malfunctions in work of system and provides operation of the protective mechanisms transferring the corresponding knots to the mode of emergency functioning with the working parameters set by default. Fuel pump and fuel pipes Supply of fuel from a gasoline tank in system of injection and return of its surplus back in a gasoline tank is carried out on two metal lines laid under the car bottom. The scheme of an arrangement of the fuel pump and connection to the fuel tank of lines of giving and return of fuel The submersible electric fuel pump of bladed type is located in a gasoline tank and is united in uniform assembly with fuel consumption sensor block. At the exit of a gasoline pump the fuel filter providing a filtration of particles up to 20 ÷ in size of 30 microns is provided. The system of return of fuel evaporations carries out removal of vapors of fuel back in a gasoline tank on the separate returnable line. The fuel tank is equipped with a cover of a special design in which the safety valve which is not allowing excessive lowering of pressure in a tank of rather atmospheric is built in. Cover of the fuel tank
The fuel pump continues to function during all operating time of the engine, i.e. while ESM receives basic impulses from electronic system of ignition (see the Head Elektrooborudovaniye of the engine). 2 ÷ 3 seconds later after interruption in supply of basic impulses the pump stops. On some models the additional ejector pump is used. Scheme of functioning of the ejector pump
The pump uses energy of a stream of the excess fuel returned from the engine for creation in the working camera of depression. The created depression facilitates the procedure of absorption of fuel. At an overshoot of a jet of the returnable line of fuel comes back in a gasoline tank via the reducing valve. |
|
